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据报道,日本住友金属工业公司和歌山厂5号顶底复吹转炉寿命达7777炉(在此期间没作任何中间或部分维修),刷新了川崎钢公司水岛厂的7035炉记录,创世界记录。该项记录主要是通过改进耐火材料和操作技术实现的。用过程控制计算机控制吹炼操作,实现最佳精炼,使转炉炉衬负荷最小。新研制成功的组织微细、致密的耐火材料是利用高纯熔融镁砂和片状石墨经特殊配料,在高压下成型制成的。从炉底到侧壁呈球面状衬。在使用期间可减少应力集中。顶底复吹转炉采用此项技术,尚是首次。另外,利用废耐火砖和渣的覆层保护耐火材料,在出钢后,添加碎耐火砖,有助于保护炉衬。摘自《世界金属导报》,第48期
It is reported that Sumitomo Metal Industries Co., Ltd. and Wakayama Plant No. 5 top and bottom blowing converter life expectancy of 7777 furnace (in the meantime did not make any intermediate or part of the maintenance), refresh Kawasaki Steel Corporation water island plant 7035 furnace records, a world record . The record is mainly achieved by improving refractory materials and handling techniques. Process control computer-controlled blowing operation, to achieve the best refining, the converter lining minimum load. The newly developed microstructure of fine, dense refractory material is the use of high-purity fused magnesia and flake graphite with special ingredients, molded under high pressure. From the bottom of the furnace to the spherical lining. Reduce stress concentration during use. Top and bottom blowing converter using this technology is still the first time. In addition, the use of waste firebrick and slag coating to protect the refractory material, after tapping, adding broken refractory bricks, help to protect the lining. Excerpt from “World Metal Herald,” No. 48